Retirement Plans (Tables)

3 Months Ended

Mar. 30, 2025

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended March 30, 2025 and March 31, 2024, Teradyne’s net periodic pension cost was comprised of the following:

	For the Three Months Ended
	March 30, 2025						March 31, 2024
	United States			Foreign			United States			Foreign
	(in thousands)
Service cost	$	214		$	124		$	231		$	117
Interest cost		1,709			262			1,647			246
Expected return on plan assets		(1,317	)		(22	)		(1,268	)		(16	)
Total net periodic pension cost	$	606		$	364		$	610		$	347

Postretirement Benefit Plans

Net Periodic Pension and Postretirement Benefit Costs

For the three months ended March 30, 2025 and March 31, 2024, Teradyne’s net periodic postretirement benefit cost was comprised of the following:

	For the Three Months  Ended
	March 30, 2025			March 31, 2024
	(in thousands)
Service cost	$	10		$	10
Interest cost		73			73
Amortization of prior service credit		(2	)		(2	)
Special termination benefits		684			292
Total net periodic postretirement benefit cost	$	765		$	373